﻿//  Copyright 2023 Google LLC. All Rights Reserved.
//
//  Licensed under the Apache License, Version 2.0 (the "License");
//  you may not use this file except in compliance with the License.
//  You may obtain a copy of the License at
//
//  http://www.apache.org/licenses/LICENSE-2.0
//
//  Unless required by applicable law or agreed to in writing, software
//  distributed under the License is distributed on an "AS IS" BASIS,
//  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
//  See the License for the specific language governing permissions and
//  limitations under the License.

using System;

namespace NtCoreLib.Ndr.Ndr64;

/// <summary>
/// Class to represent the a fixed array type.
/// </summary>
/// <remarks>NDR64 doesn't maintain a type for the elements. It just assumes it can blit the data.</remarks>
[Serializable]
public sealed class Ndr64FixedArrayTypeReference : Ndr64BaseArrayTypeReference
{
#pragma warning disable CS1591 // Missing XML comment for publicly visible type or member
    public int TotalSize { get; }

    public override int GetSize()
    {
        return TotalSize;
    }

    protected override int GetElementCount()
    {
        return TotalSize / (Alignment + 1);
    }

    internal Ndr64FixedArrayTypeReference(Ndr64ParseContext context, IntPtr ptr) 
        : base(Ndr64FormatCharacter.FC64_FIX_ARRAY)
    {
        var fix = context.ReadStruct<NDR64_FIX_ARRAY_HEADER_FORMAT>(ptr);
        Alignment = fix.Alignment;
        TotalSize = fix.TotalSize;
    }
#pragma warning restore CS1591 // Missing XML comment for publicly visible type or member
}